SVR4_IOWR          89 compat/svr4/svr4_sockio.h #define	SVR4_SIOCGIFFLAGS	SVR4_IOWR('i', 17, struct svr4_ifreq)
SVR4_IOWR          90 compat/svr4/svr4_sockio.h #define	SVR4_SIOCGIFCONF	SVR4_IOWR('i', 20, struct svr4_ifconf)